Lightning arrester



Sept. 27, 1938.

EA. EVERETT: LIGHTNING ARRESTER Filed Aug. 13, 1934 M1 E E 3 l Z H IZ Patented Sept. 27, 1938 1 LIGHTNING ARRESTER.;-. dwa en. ve ett. s sland.- city, n; GustaveAlNelsonand william lt' l oug fid 'e" executors of. said Edward A. Everett, deceased, H

assignorsto E. A. Everett, Inc.-, Bong Island Qi-ty,"N Y., a corporation-of New *York metastasis, 193 er al 80 1 g s.- o -1 15 3 I This invention. relatessto: lightning arresters ly-space lntpractice-it isznot.possible to mould and it hasioranobject to provide .an arresteriof dowel pinsinto, porcelain fer. this; purpose .a'ndzit the spark gap type in which.the...elements; of; the is thereforenecessary.totprovide an aperture in arrester. may be assembled and disassembled on the-porcelaingin whichjthe dowel ,pin is accurately aninsulatedbase withoutrvarying the sparking positioned and; their secured; imposition in the relation. of. these elements. .More. particularly, aperture by cement;0r- Q1 her. means. Each part the arrester. comprises a. base -;of porc elaimwhich is comparatively loose on .the binding post-but is is moulded with apertures-to receive the attach-l provided-with at leasttwo dowels by whichit} is ment of the. elements of. the arresterincluding firmly secured inthe positionidesired. m apertures in which dowel :pinsare accuratelyse- In the drawing-,; l.!;is .the porcelain base; jZ is r 0 cured and by means of these dowel pins the-ele'e the-apertures-, for-thebindingposts.opening from ments.v of.the. arrester. are-.inaintained accurately the b9tQmi y. 3lS the binding postgat. one; end for in a predetermined sparking relation to each securing disc a p e and I6 iSthe binding other. The elements may be removed and re-' post at the opp i end Securing discharge placed, or replaced with other elements on the p at 5 On top of the base. The intermediate 15 dowel pins without materially changing the rebinding posts Secure the discharge blocks lation of the parts. to the base through the top plates 19.

Other objects of the invention will appear from h discharge blocks a c d in a w the following specification and the accompanying tween the discharge Plates a d 5 as Show i drawing, in which: Fig. 2 and arespaced byan air gap at 20 above 20 Fig. 1 is a side elevation of the arrester, partly h grove 2| formed in the afie- Longitudinal sectioned; grooves are alsoformed in the base at 24 and 25 Fig. 2 is a top plan view of the arrester; below the Spark p discharge po s 21 0 e Fig. 3 is a sectional elevation on line 3 3 of p a l4 and it These p t s hav a ep notch 25 Fig. 2; at 26 above the transverse grooves 2|. This is in 5 Fig. 4 is a plan view of th u d id of th accordance with the construction of U. S. Patent base; 1,714,552, May 28, 1929.

Fig. 5 is a template that may be used to space The dowel pins 32 have a collar 33 and a stem the dowel pins; 34 loosely mounted in the cavity 36 of the base Fig. Bis aside elevation of one of the discharge H and secured in po tio y t e c m t 5- 30 blocks; The pin 32 is smaller than the aperture 4| Fig. 6a is a plan view of the underside of the through which it P jects t engage the eledischarge block in Fig. 6; ments of the arrester. When applied to plates Fig. 7 is a cross-section on anenlarged scale of l4 and I5 t e dow p are threaded to 5 the porcelain base with the dowel pin cemented in ceive the screws 3| to hold'the plates in place. 5

place, and The binding post for the discharge block is placed Fig. 8 is an alternative to Fig. '1 in which the in the apert r 3 and he. adjoining p r r s dowel pin is screwed intoa metal plug in the 38 are used for the dowel pins which are inbase. serted to register with the apertures 39 and 40, 4 This arrester is of the multi-path type shown Fig. 6 in the base of the discharge block. It 40 in my Patent 1,988,650, of January 22, 1935 and will be noted that the aperture in the base is co-pending with the present application. It comshouldered or made in two stages and the collar prises a porcelain base upon which are mounted 33 of the dowel. is larger in diameter than the a row of discharge blocks connected to the base top opening but is smaller than the lower openby binding posts and a discharge plate on each ing. The collar rests against the shoulder as 45' side of said discharge blocks, said discharge plates the sealing material is poured into the large are also secured to the base by binding posts. It opening and it prevents the sealing material is important to be able to remove and replace the from entering the small opening.

discharge blocks and the discharge plates with- The plates l4 and I5 are drilled in a fixture out changing the discharge relation between these to register with the dowel pins and the dis- 5 parts. charge blocks are drilled at 39 and 40 to reg- The porcelain base is made in the usualmouldister with the dowel pins. These blocks may ed form with apertures to receive the binding be made from a variety of materials such, for posts. The base is also provided with dowel pins instance, as is disclosed in U. S. Patent 1,818,184,

by which the elements of the arrester are properof August 11, 1931. Where the material can 55 be accurately moulded the holes 39 and 40 may be formed in the mould.

The dowel pins may be positioned by a tem plate 55, Fig. 5, which is provided with an aperture 31' to receive the binding post and has the holes 52, 53 and 54 properlyspaced to receive and position the dowel 'pins whileirthey are cemented in the'base. The'hols 5|, '52," are for the discharge plates l4 and I5 and the holes 53 and 54 are for one of the discharge blocks. ;c onnecting a conductor to said block and a con- In the construction shown in Fig. B theapere ture 36 is provided with a. metal plug 44 which may be screwed or moulded in place. Thisplu'g is drilled by a template fonthestem .43 of the dowel 32 which is screwed into,v the plug and in moulded materials like Bakelite which have comparatively little shrinkage and where the metal dowels can be mouldedintb the stock. This practice is not possible with porcelain which shrinks unevenly and which would fracture if a metal dowel were moulded into thestock. The use of porcelain'for-a lightning a'rrester base is highlydesirable and the only way to make it practical for present purposes is to locate thedowels loosely in apertures in the porcelainand then secure themin place through plugs which are fixedly located in the apertures} Havirlg thus described my invention, '1 claim: 1. A lightning arrester comprising a base of porcelain having shouldered apertures therein with a dowel pin in each aperture, said pins being of smaller diameter than said apertures and each having a collar engaging the shoulder of the aperture, said pins located in a predetermined fixed,relation tg.eachother and cemented in position in saidapertures', a discharge block mounted on'a pair o'fs'aid dowel pins and ,a,plate mounted on another pair of said pins in sparking relation to said block and means for ductor to said plate. 7

2. Alightning arrester comprising a base of porcelain'having shouldered apertures therein and with the larger opening of each aperture extending to the base, dowel pins having a collar placed in said apertures, the pins being smaller in diameter than the apertures and the collar being larger in diameter than the upper aperture and smaller in diameter than the lower aperture, said dowel pins-being located ina predetermined, fixedrelation to each otherand secured in position when so located by cement applied to the' largerOpening of -.the base, a discharge block engag g a plurality of said pins to accurately positionsaid block on said base, adischarge plate: engaging a plu'ralityof said pins tosecure the plate in sparking relation to said block, means for securing a conductor to said block and means .for securing a conductor to said plate. 7 i v n EDWARD A. EVERETT. 

